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A kind of hydrocracking method

A hydrocracking and hydrorefining technology, applied in hydrotreating process, petroleum industry, treatment of hydrocarbon oil, etc., can solve the problem of high activity of molecular sieve hydrocracking catalyst, low reaction temperature and low yield of middle distillate oil, etc. problem, to achieve the effect of protecting activity and selectivity, high safety and improving yield

Active Publication Date: 2015-07-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with amorphous hydrocracking catalysts, molecular sieve hydrocracking catalysts have high activity and low initial reaction temperature, but the yield of middle distillates is relatively low

Method used

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  • A kind of hydrocracking method

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Experimental program
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Effect test

Embodiment 1

[0035] When the reaction pressure is 14.5MPa, the reaction temperature in the hydrofinishing section is 380°C, the reaction temperature in the hydrocracking section is 370°C, and the volumetric space velocity (for fresh raw materials) in the hydrofinishing section is 1.8h -1 , the volumetric space velocity of the hydrocracking section (for all feeds in the hydrocracking section) is 1.3h -1 Under the reaction conditions, with the hydrocracking method that the present invention provides, adopt raw material A to carry out test, the ratio of fresh raw material oil entering hydrofinishing reactor and hydrocracking reactor is 9:1, tail oil fraction is all recycled back to Hydrocracking reactor. H in the reaction atmosphere of the hydrocracking reactor 2 S partial pressure is 0.015MPa, NH 3 The partial pressure is 0.003MPa. The test results are shown in Table 2. Based on 100% fresh raw materials, the yields of jet fuel and diesel are 41.82% and 38.50%, respectively, the total yiel...

Embodiment 2

[0037] When the reaction pressure is 14.5MPa, the reaction temperature in the hydrofinishing section is 380°C, the reaction temperature in the hydrocracking section is 360°C, and the volumetric space velocity (for fresh raw materials) in the hydrofinishing section is 1.8h -1 , the volumetric space velocity of the hydrocracking section (for all feeds in the hydrocracking section) is 1.3h -1 Under the reaction conditions, with the hydrocracking method that the present invention provides, adopt raw material A to carry out test, the ratio of fresh raw material oil entering hydrofinishing reactor and hydrocracking reactor is 20:1, tail oil fraction is all recycled back to Hydrocracking reactor. H in the reaction atmosphere of the hydrocracking reactor 2 S partial pressure is 0.006MPa, NH 3 The partial pressure is 0.0012MPa. The test results are shown in Table 3. Based on 100% fresh raw materials, the yields of jet fuel and diesel are 41.12% and 38.15%, respectively, the total yi...

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Abstract

The invention discloses a hydrocracking method comprising the steps that raw oil is divided into raw oil I and raw oil II according to a certain proportion; the raw oil I is mixed with hydrogen and is heated by a heating furnace I, and then, the mixture enters a hydrorefining reactor together with an effluent from a hydrocracking reactor and reacts under the action of a hydrorefining catalyst; the raw oil II is mixed with a tail oil distillate and is heated by a heating furnace II after being mixed with a hydrogen-rich gas, and then, the mixture enters the hydrocracking reactor and reacts under the action of a hydrocracking catalyst, wherein the reaction effluent of the hydrorefining reactor is separated and distillated to obtain the hydrogen-rich gas, a light naphtha distillate, a heavy naphtha distillate, middle distillate oil and a tail oil distillate. The method provided by the invention can be used for treating heavy distillate oil and producing the middle distillate oil at the maximum quantity.

Description

technical field [0001] The invention belongs to a hydrocracking method for obtaining low-boiling distillate hydrocarbon oil in the presence of hydrogen. Background technique [0002] With the deterioration of crude oil quality year by year and the increasingly stringent environmental protection requirements worldwide, the hydrocracking process, as one of the main means of crude oil secondary processing and heavy oil lightening, has strong raw material applicability, flexible production plan, liquid With high product yield and good product quality, it is playing an increasingly important role in the deep processing of sulfur-containing and high-sulfur crude oil to produce clean fuels, and its application range is becoming more and more extensive. [0003] In recent years, the market demand for various oil products, especially high-quality middle distillate products, has continued to grow, and the pressure on refineries to produce high-quality middle distillate products has al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 蔡珂胡志海董建伟蒋东红董松涛陈元君赵阳赵广乐王子文
Owner CHINA PETROLEUM & CHEM CORP
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